<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }
        .main {
            text-align: center;
            margin: 20px auto;
        }
        .days ul {
            text-align: center;
            margin: 0 auto;
            width: 500px;
        }
        .days ul li {
            background-color: tomato;
            width: 60px;
            float: left;
            list-style: none;
            margin: 10px;
        }
    </style>
</head>
<body>
    <div class="main">
        <p>
            <label for="calender">Select month:</label>
            <select name="calender" id="calender">
                <option value="January">January</option>
                <option value="February">February</option>
                <option value="March">March</option>
                <option value="April">April</option>
                <option value="May">May</option>
                <option value="June">June</option>
                <option value="July">July</option>
                <option value="August">August</option>
                <option value="September">September</option>
                <option value="October">October</option>
                <option value="November">November</option>
                <option value="December">December</option>
            </select>
        </p>
        <h1 id="month"></h1>
        <div class="days">
            <ul></ul>
        </div>
    </div>

    <script src="../js/日历.js"></script>
</body>
</html>